/Engine/Source/Runtime/Engine/Classes/Kismet/KismetMathLibrary.h
Finds the minimum area rectangle that encloses a set of coplanar points. Uses the exhaustive search algorithm inhttp://www.geometrictools.com/Documentation/MinimumAreaRectangle.pdf
static void MinAreaRectangle ( [UObject](API\Runtime\CoreUObject\UObject\UObject) * WorldContextObject, const [TArray](API\Runtime\Core\Containers\TArray)< FVector > & InPoints, const FVector & SampleSurfaceNormal, FVector & OutRectCenter, FRotator & OutRectRotation, float & OutRectLengthX, float & OutRectLengthY, bool bDebugDraw )